Mainspring-winder



(No Modl.) I Y JSTARKJL MAIN-SPRING' WINDER.

NQ. 356,802. Patented Feal 1887.

Wqg 5 5E 5.

lilnrrnn Sri/fires PATENT @einen JGHN STARK. JR., OF W'ALTHAllI, llIASSACHUSETTS.

MAlNsPniNo-winnen.

SPECIFICATION forming part of Letters Patent No. 356,802, dated February l, 1887.

Application filed A pril 5, 1896.

To all whom zz'r may concern:

Beit known that; l, JOHN STARK, Jr, of Waliflinni, county of liliddlesex, and State of Mesem, elioeetts, lin-ve invented an Improvement in iiininepringlllinders, of which the following description, in connection with the accompanying drawings, is o, specification, like letters on olie drawings representing like parte.

This invention is en improvement npon Letters Patent No. 333,251, granted December 29, 1885, to H. H. Pulver, and line for its object to both simplify the construction and to produce n more edieienl; device and one less liable io get ont of order.

To this'end iny invention eonsisls,essentinl ly, of e support, having head and teil pieces en taelied thereto and bored axially io reeeive o rotating spindle, combined with t-Wo or more spring-controlled jews mounted in the toilpieee ond adopted to hold the 1nninepring,tl3e engaging end of the Seid jews moving` in radial eloe out in the periphery of the head-piece, adjustment of the said jews determining the dionieier of the xnninepring to lie wound.

illy inrention also includes other improvements, which will beliereinnfter described and speeilied in the claims.

The tail-piece ie slotted radially to corre spend Winn the slots in the liend-pieee, and the jews to liold the spring are curved or beveled et: their renr or pivotal ends io form curved benringnnrlnoes, upon which the said jaws rock, o Het coiled Spring liti-ing in on annular groove oni; in the toil-piece pressing n pon the entre-nie ends of the seid jaws beyond their Curved bearing-sorleees, the spring normally noting `to foren the engaging ende of the said jaws outwardly from each other for the reception between rhein oi the ineinsprin. An enn teruel cylinder or ense, slotted to pass the snpport, is slipped over the operating parte to preteen the seine from harm.

Figure l. shows in side elevation on apparatus for Winding nininsprings embodying this invent-ion; Fig. 2, n, longitudinal eeetion of Fig. l;- Fig;` 8, n detail of one of elle jews for holding the moinspring to lie Wound; Fig. 4,

n riglinlinnd eide View of Fig. l; and Fig. 5,

e erossisection of Fig. l, taken on the dotted line e The enppori A, of suitable shape to be held by a vise, line attached io ii, of; enelx end or enen integral with it, cylindrical head and tail pieces, a b, the former of which is externally Screw-threaded, as et. af, to time forni n frame to supporti the operating port-S.

Both head and tail pieces e l) are bored axially to receive n rotating spindle, c, While screw Within the head-piece being devoid of y threads and for o portion of its length eneireled by n spiral spring, 3, so that one said disclmrgeplnngerfmny be moved longitudinally to discharge a coiled ineinspring by moving' ille roteti ng Spindle c longitudinally, as in the patent referred to, the pin e striking against the end of the tubular portion of the sind discharge-plunger f. The rotating spindle e is prevented from being Withdrawn by n Soren", el, lie end of which enters n redneed portion, e', of the said spindle.

The tail-piece Z1, lieodpieeee, and discharge plnngerf ere all correspondingly slotied redially, es ai; n, to receive -lie jaws o, (see detail, Fig. 3,) which receive between their outer ends and hold the inninspring to be Wound, there being, ne herein shown, fonr sneh jews. The seid jews o consist of dat; pieces of metal curved or beveled on their nnder side, es ab O,Wit.liin line teil-piece Z2 to form e curved bearing-surface upon which the seid jews rook.

A iinb spring, s, enoirclee tlietoilpieee 1;,tlie

Said spring ting in on annuler groove ono in the exterior thereof, which spring continuellybears upon the extreme ends of tnespringholding jews o beyond the Curved bearing- Sn'rfaeee o', thus normally keeping the enter opposite ends of the Said jews spread eport.

The outer or Spring-engaging; ends, o?, of the jaws o are provided with inclined surfaces o3, which are noted upon by ille inclined interior oi an adjnetingnnb, n, turning on the Soren'- 'chreeds a of the heed-piece e, so that; es the said adjusting-nut is moved to and iro the ICD engaging end of each' of the said jaws is caused toapproach and recede from the spindle c. The engaging ends of the jaws o are also providedwitli small projections o", with;

in which the mainspring is wound, to thereby limit or determine its external diameter when Wound, and over which the mainspring-barrel is` placed to gage the diameter of the mainspring tobe wound.

A cylindrical shell or ease, B, slotted at its under side to pass the support A, is slipped over and so as to conceal the main port-ion of the apparatus, it being held in position by the Screw 4 passing therethrough.

It will be seen that the jaws o, being free lo rock upon the curved bearing-surface o', and being continually under the control of the spring s, the engaging ends o2 thereof are caused to `normally recede from each other,sucl1 movement being,` however, limited by the adjusting-nut a, which, upon being turned, may p0- sition the said engaging ends at any desired distance apart.

The bperation of the apparatus is similar to `that described in the patent referred to, with the exceptions above noted, and therefore further description is deemed unnecessary.

By providing `head and 'tail pieces, as described, much time andlabor in constructing the device is saved, as well as expense reduced.

Herein the inclined parts o3 ofthe jaws, and againstwhich the nut a acts to close the jaws upon the spring, are placed close to the holding ends of the jaws, thus enabling thejaws to more rmly grasp and hold the said spring.

I claiml. In an apparatus for winding mainsprings, the combination, substantially as described, of the support and head and tail pieces fixed thereto, boredv axially and slotted radially, the independent and rotating spindle turning in the central bore, and the adjustable springcontrolled jaws o, having curved bearing-surfaces o, said jaws being located and arranged to move radially only in the slot out in the head and tailpieces, and means, substantially as described, for rocking said jaws on their r curved bearing-surfaces, an outer shell or case, B, and a spring controlled longitudinallymovable discharge-plungerf.

2. In an apparatus forwinding mainsprings,

vthe support and head and tail pieces attached thereto and thelongitudinally-movable rotating spindle, Vcombined with the spring-controlled discharge-plunger f, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JourT STARK, JR.

W'itnesses:

G. XV. GREGORY, C. M. GONE. 

